Myeloma, also known as multiple myeloma, is a cancer arising from plasma cells, a type of white blood cell which is made in the bone marrow. Bone marrow is the ‘spongy’ material found in the centre of the larger bones in the body. The bone marrow is where all blood cells are made.
Plasma cells form part of your immune system. Normal plasma cells produce antibodies, also called immunoglobulins, to help fight infection. In myeloma, these plasma cells become abnormal, multiply uncontrollably and release only one type of antibody – known as paraprotein or M protein ( Monoclonal protein) – which has no useful function. It is often through the measurement of this paraprotein/ M protein that myeloma is diagnosed and monitored.
Myeloma affects multiple places in the body (hence ‘multiple’ myeloma) where bone marrow is normally active in an adult i.e. within the bones of the spine, skull, pelvis, the rib cage, long bones of the arms and legs and the areas around the shoulders and hips. Myeloma is a relapsing-remitting cancer. This means there are periods when the myeloma is causing symptoms and/or complications and needs to be treated, followed by periods of remission or plateau where the myeloma does not cause symptoms and does not require treatment.
Source: myeloma.org.uk / Irish cancer society / NCCP